UJPTERA, 3G9 



A second gononil division of the Muscides, that of the Anthomy- 

 ziDEs, is composed of species resembling common Flies, in which the 

 wings are most frequently incumbent and do not vibrate, and where 

 the antennae are inserted near the front, are always shorter than the 

 liead, termimated by a linear palette or one forming a long square, 

 longer than the preceding joint, and with the seta most commonly 

 plumous. The head is hemispherical, furnished with hairs anteriorly, 

 and the eyes are closely approximated or contiguous posteriorly in the 

 males. The legs are of an ordinary size, and the abdomen is com- 

 posed exteriorly of four annuli. 



In some, the antennae are almost as long as the face of the head, 

 and the seta is plumous. 



Sometimes the abdomen of both sexes is gradually narrowed, and 

 terminates in a point. 



Anthomia Meig. — Musca, Z-in., Fab., 

 Where the eyes are separated in both sexes; the proboscis does not 

 terminate in the manner of a hook, or by an abrupt and very open 

 angle. 



A. pluvialis ; ]\Iusca pUivlalis, L., Cinereous, with black spots 

 on the t]iorax,and nine triangular ones of the same colour on 

 the abdomen. Very common in France*. 



Drymeia, Meig., 

 Where the proboscis presents the above character, and the eyes are 

 contiguous posteriorly in the males f. 



Sometimes the abdomen of these individuals is inflated at the end, 

 and clavate. 



C(EX0siA, Meig. — Musca, De Geer. 



De Geer has given us the history of a species of this subgenus — 

 Musca fungorum. Insect., VI, 89, v. 2 — 7. Its larva lives in mush- 

 rooms, and most commonly in those which are edible. He also ob- 

 served that these larvae devour each other, a rare circumstance among 

 Insects of this order ;{:. 



In the others, the antennai are shorter, and have a simple seta. 



The eyes are contiguous posteriorly in the males. The mouth is 

 densely pilose. 



ERiPHiA,Mei^.§ 



Our third division, that of the Hydromyzides, is characterized as 

 follows : an almost triangular head with very prominent eyes ; an in- 

 flated convex snout or muzzle : a little arched lamina bordering the 

 top of the buccal cavity, which is very large; a very thick proboscis, 

 and the sides of the face destitute of setae. The antennae are inserted 

 near the front, inclined, and very short, with the seta most commonly 

 plumous. The wings are incumbent, one on the other. The legs 

 are large, with the thighs, at least the anterior ones, inflated in 

 several. 



All the species indigenous to France inhabit aquatic localities. 



* See Meigen. I See Meigen. 



t Idem. § Idem. 



